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Very Low Freq Noise when summing D/A outputs 1701

Question asked by BRO on Mar 15, 2015

I only need 1 output so I used an inverting summer to add all the D/A together for better noise. Works at HF but I have a very low frequency flicker noise that comes and goes. Mute does not affect it. Don't see it with only 1 channel powered up. Whats going on?

Brian

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